Studies on Absorption Spectra of Ni++Ion in NiCl2in Different Organic Solvents

1964 ◽  
Vol 41 (12) ◽  
pp. 3683-3688 ◽  
Author(s):  
N. S. Chhonkar
Keyword(s):  
Absorption Spectra ◽  
Organic Solvents

scholarly journals On the influence of their state in solution on the absorption spectra of dissolved dyes

1909 ◽  
Vol 82 (554) ◽  
pp. 256-270 ◽  
Keyword(s):  
Refractive Index ◽  
Absorption Spectra ◽  
Organic Solvents ◽  
Absorption Maximum ◽  
Previous Investigation ◽  
Cyanine Dyes ◽  
Water Band ◽  
The One

In a previous investigation of the absorption spectra and sensitising properties of some iso cyanine dyes,* the influence of the solvent was examined and it was found that the absorption maximum was shifted toward the red as the refractive index of the solvent increased. This is in accordance with Kundt’s law. The absorption in water, however, differs markedly from that in organic solvents. In the latter the spectrum consists of a prominent band in the orange and a half-shade nearer the blue. In water this half-shade has become a separate band comparable in intensity with the orange. Absorption curves in alcohol and water are shown. It is convenient to term the band near the red the β-(organic) band, the one nearer the blue the α -(water) band. It appeared desirable to investigate this difference further.

A Technique for Obtaining the Infrared Absorption Spectra of High Gel Rubbers

1957 ◽  
Vol 30 (1) ◽  
pp. 352-353
Author(s):  
Bernard M. Mitzner
Keyword(s):  
Sample Preparation ◽  
Polymer Solution ◽  
Absorption Spectra ◽  
Organic Solvents ◽  
Rock Salt ◽  
Infrared Absorption ◽  
Convenient Method ◽  
Benzene Solution ◽  
Liquid Cell ◽  
Infrared Absorption Spectra

Abstract Several techniques have been previously described for obtaining the infrared absorption spectra of various types of rubbers. The most convenient method is to dissolve the substance under investigation in a suitable solvent and obtain the spectrum as a solution employing a sealed liquid cell. Another technique that is commonly employed is to evaporate a benzene solution of the polymer to dryness on a rock salt plate, thus obtaining a film. A more time consuming procedure consists of floating a polymer solution on a mercury pool which can subsequently be picked up by a steel frame and studied as a film. All the above procedures, although useful when investigating low gel rubbers, cannot be successfully employed with high gel rubbers. Modified polybutadiene crumb rubbers form extremely stable gels, and are almost completely insoluble in all common organic solvents. Because of this great insolubility, one is limited in infrared sample preparation. Attempts to employ the KBr pressed disc technique have met with very little success in our laboratory.

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